GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 12 Dec 2018, 00:28

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
  • GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

     December 14, 2018

     December 14, 2018

     09:00 AM PST

     10:00 AM PST

    10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.

Scott, Jean , and warren are all building wooden models for an archite

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Director
Director
User avatar
G
Joined: 20 Feb 2015
Posts: 796
Concentration: Strategy, General Management
Premium Member
Scott, Jean , and warren are all building wooden models for an archite  [#permalink]

Show Tags

New post 29 Sep 2018, 23:41
1
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

90% (01:22) correct 10% (00:49) wrong based on 20 sessions

HideShow timer Statistics

Scott, Jean , and warren are all building wooden models for an architectural presentation at noon tomorrow. If their individual probabilities of finishing on time are x, \(\frac{1}{3}\) , and \(\frac{1}{7}\) , respectively , then what is the probability that warren will finish on time but Jean and Scott will not ?



a. \(\frac{(21x-38)}{21}\)
b. \(\frac{12x}{21}\)
c. \(\frac{(2-2x)}{21}\)
d. \(\frac{(2-4x)}{21}\)
e. \(\frac{(4x-56)}{21}\)
Senior Manager
Senior Manager
User avatar
P
Joined: 18 Jul 2018
Posts: 486
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Premium Member Reviews Badge CAT Tests
Re: Scott, Jean , and warren are all building wooden models for an archite  [#permalink]

Show Tags

New post 29 Sep 2018, 23:52
1
All are independent activities.

The probability of finishing the task on time by individuals

Scott = x

Jean = 1/3

Warren = 1/7

The probability of not finishing the task on time.

Scott = 1-x

jean = 1-1/3 = 2/3

Warren = 1-1/7 = 6/7

Now,
Warren finishes on time, But Scott and Jean Don't.

the probability that Warren will finish on time but Jean and Scott will not = (1-x)*2/3*1/7 = \(\frac{(2-2x)}{21}\)

C is the answer.
_________________

When you want something, the whole universe conspires in helping you achieve it.

GMAT Club Bot
Re: Scott, Jean , and warren are all building wooden models for an archite &nbs [#permalink] 29 Sep 2018, 23:52
Display posts from previous: Sort by

Scott, Jean , and warren are all building wooden models for an archite

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron
Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.